Numerous adsorbents have been introduced to efficiently remove heavy metals and organic dyes from environmental water samples. However, magnetic a porous network aerogels are rarely developed to capture inorganic and organic pollutants from aqueous. We herein fabricated hexagonal boron nitride nanosheets (h-BNNSs)-based on magnetic hybrid aerogels (MHAs) as a lightweight adsorbent for robust uptake of Cr(VI), As(V), methylene blue (MB) and acid orange (AO). The synthetic procedure of poly(ethyleneimine)-modified h-BNNSs (PEI-h-BNNSs) involved thermal poly condensation of melamine and boric acid, pyrolysis of the resultant products which allowed exfoliated by ultra-sonication process further functionalization with PEI-mediated modification of h-BNNSs. The as formed PEI-h-BNNSs allowed in-situ formation of magnetite nanoparticles (Fe₃O₄ NPs) decorated on their surfaces, which are turned to be PEI-h-BNNSs@Fe₃O₄ NPs. The lyophilization treatment of PEI-h-BNNSs@Fe₃O₄ NPs-loaded PVA hydrogels generated the MHAs with large porous structures, diverse and numerous functional groups, good super-paramagnetic and a zero net surface charge. These features enabled the proposed adsorbent (MHAs) to be utilized to efficiently remove Cr(VI), As(V), MB, and AO from an aqueous solution, with maximum adsorption capacity estimated to be 833, 426, 415, 286 mg g⁻¹, respectively. The adsorption kinetics and isotherm data demonstrated that MHAs mediated adsorption of Cr(VI), As(V), MB and AO followed the Freundlich isotherm model and a pseudo-second-order kinetics model. This finding signifies that the MHAs exhibit heterogeneous binding behavior with multilayer chemisorption of Cr(VI), As(V), MB and AO. Subsequently, the practical application were validated by conducting their detoxification of chromium and arsenic in soli-sludge samples.

已经引入了许多吸附剂来有效地从环境水样中去除重金属和有机染料。然而，很少开发磁性多孔网络气凝胶来捕获水中的无机和有机污染物。我们在此制造了基于磁性混合气凝胶 (MHA) 的六方氮化硼纳米片 ( h -BNNSs)，作为轻质吸附剂，可有效吸收 Cr(VI)、As(V)、亚甲蓝 (MB) 和酸性橙 (AO) . 聚（乙烯亚胺）修饰的h -BNNSs (PEI -h- BNNSs) 的合成过程涉及三聚氰胺和硼酸的热缩聚，所得产物的热解，从而允许通过超声处理剥离的产物进一步通过 PEI 介导的修饰进行功能化小时_-BNNS。所形成的PEI- h -BNNSs 允许在其表面原位形成装饰在其表面上的磁铁矿纳米粒子 (Fe ₃ O ₄ NPs)，这变成了PEI- h -BNNSs@Fe ₃ O ₄ NPs。PEI- h -BNNSs@Fe ₃ O ₄ NPs负载的PVA水凝胶的冻干处理产生了具有大孔结构、多种官能团、良好的超顺磁性和零净表面电荷的MHA。这些特性使所提出的吸附剂 (MHA) 能够有效地从水溶液中去除 Cr(VI)、As(V)、MB 和 AO，最大吸附容量估计为 833、426、415、286 mg g^-1，分别。吸附动力学和等温线数据表明，MHAs 介导的 Cr(VI)、As(V)、MB 和 AO 的吸附遵循 Freundlich 等温线模型和准二级动力学模型。这一发现表明 MHA 表现出异质结合行为，具有 Cr(VI)、As(V)、MB 和 AO 的多层化学吸附。随后，通过对固体污泥样品中铬和砷的解毒验证了实际应用。